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English (US)
8. Startup
After having carried out the mechanical, electrical and hydraulic
installation described in sections
and
, proceed as follows:
8.1 Positive inlet pressure startup procedure
1. Check that the precharge pressure in the diaphragm tank is
0.7 times the required discharge pressure (setpoint).
Note, precharge must be set with zero pressure on the tank.
2. Close all pump discharge isolation valves on Multi B system.
3. Open discharge valve on one pump and turn tap on discharge
side of system allowing water to pass through pump. Once
complete, close discharge isolation valve.
4. Repeat step 3 for all remaining pumps on system. Once
complete, open discharge isolation valve on all pumps after all
pumps have been vented.
5. Switch on the main disconnect switch.
6. Turn system on by pressing on off button and adjust setpoint
to desired setpoint value by pressing up
or down
button
on the controller.
8.2 Flooded suction and suction lift startup
procedures
1. Check that the precharge pressure in the diaphragm tank is
0.7 times the required discharge pressure (setpoint).
Note, precharge must be set with zero pressure on the tank.
2. Switch off the main disconnect switch on the cabinet front.
3. Switch off the circuit breakers (located inside the cabinet) of
all pumps.
4. Set the "Normal/Emergency" switch (located on the front of
the control cabinet) for all pumps to "Emergency".
5. Close all pump discharge valves and prime all pumps. The
pumps are primed by opening cap on port of check valve
positioned closest to pump and filling water into port. The
pump is primed when water no longer is able to fill into pump.
Reinstall cap on check valve port and repeat for all pumps.
6. Switch on the relevant circuit breaker of pump to be started.
7. Switch on the main disconnect switch; this will start the pump
with relevant circuit breaker ON.
8. Vent the pump by slowly opening its discharge valve. This will
also allow gradual filling of discharge piping.
9. Set the "Normal/Emergency" switch for the relevant pump to
"Normal".
10. Switch off the main disconnect switch.
11. Repeat steps 6, 7, 8, 9 and 10 for the other pumps in the
system.
12. Switch on the main disconnect switch.
13. Adjust the required setpoint via the CU 323 by
pressing
or
.
14. Set the system to "On" by pressing
.
15. Increase setpoint to desired setpoint value.
Hydro Multi-B is now in automatic mode and ready for operation.
Caution
A positive inlet pressure is required before start-
up and during operation.
Do not start the pumps until they have been fully
primed.
Warning
When pumping hot liquids, ensure that persons
cannot accidentally come into contact with hot
surfaces of the product.
Note
Note
Initial setpoint pressure value for system is 0 psi
and maximum pressure exceeded is 22 psi above
setpoint value.
This may cause "Maximum pressure exceeded"
alarm condition after startup is complete.
Increase setpoint pressure value to desired
pressure and possibly bleed off pressure on
discharge to clear "Maximum pressure
exceeded" fault.
On
Off
